Re: How to integrate with existing site?
Moderator's note - several posts re: SEO URL re-writes have been removed for NOT answering the poster question.
Reproduce those static pages using Zen Cart's EZ pages for information and the product pages for your merchandise. Then use 301 redirects from the old pages to your new pages.
I love the program and am implementing it on a new site, but what about an old site, already indexed in Google? If you move to ZC, how do you preserve your page(s) ranking?
Please do not PM for support issues: a private solution doesn't benefit the community.
Be careful with unsolicited advice via email or PM - Make sure the person you are talking to is a reliable source.